Mitton · Earth testing
Mitton Instruments TVM1100 Tuned Voltmeter for Hire
$85 per day ex GST, 1 to 7 days
Per day, AUD ex GST. The rate for your total hire length applies to every day, and the total never drops at a band change. Minimum hire one day. Australia-only hire; freight and handling quoted separately. Hiring for more than 90 days? Call for a long-term rate: 1300 730 499
Work out your hire
Pick your first and last day to see the hire charge.
| 7 days | $595 |
|---|---|
| 14 days | $1,071 |
| 28 days | $1,785 |
| 60 days | $3,213 |
- Delivery or collection
- Freight Australia-wide, quoted with availability, or collect from Hobart, Launceston, Adelaide or Newcastle. Urgent? Call 1300 730 499 rather than send the form.
- Datasheet
- Manufacturer's datasheet (PDF). Calibration certificate supplied with the instrument.
Overview
About the Mitton Instruments TVM1100 Tuned Voltmeter for Hire
Description
The Mitton TVM1100 has been specifically designed to accompany the LCI2000C injection unit, though it can be used for the measurement of voltages associated with any off-frequency current injection test. With its excellent noise rejection, the instrument measures the often very small voltages associated with injection testing of large earthing systems, even where power system frequency noise dominates. Hire the TVM1100 from Megavar for earth grid performance testing.
The instrument is equipped with a full range high input impedance voltage measurement channel to ensure accurate prospective voltage measurements, and a second channel designed as the input for a flexible or clamp CT. Current and voltage measurements can be displayed simultaneously along with the applicable phase shift, which is what makes it useful for current split and grid impedance work rather than voltage measurement alone. It uses digital signal processing and can be tuned from 45 Hz to 65 Hz in 1 Hz steps, locking to the injected test frequency and rejecting power frequency noise at better than 70 dB. An intuitive user interface, colour LCD screen, GPS tracking and measurement data logging make fall of potential and other measurements paper-free.
Features
- Specifically designed to accompany the LCI2000C injection unit, and usable with any off-frequency injection test
- Two channels with phase angle measurement to plus or minus 180 degrees
- Tunable 45 Hz to 65 Hz in 1 Hz steps
- Noise rejection better than 70 dB, greater than 3,000 to 1, at 50 Hz and 60 Hz
- Channel 1 auto-ranging: 0 to 6 V, 0 to 60 V, 0 to 300 V
- Channel 2 input for flexible or clamp CT
- Ultra high sensitivity GPS at minus 165 dBm
- Internal memory for measurement data logging
- Trans-reflective colour LCD, readable in daylight
- Battery life 8 to 16 hours on 3.7 V lithium ion
Specifications
- Manufacturer: Mitton Instruments Ltd, Christchurch, New Zealand
- Model: TVM1100
- Channel 1, voltage: 0 to 6.0 Vrms (100 µV), 0 to 60 Vrms (1 mV), 0 to 300 Vrms (10 mV), auto-ranging
- Channel 2, current input: 0 to 3.0 Vrms, resolution 100 µV
- Phase angle: plus or minus 180 degrees
- Accuracy: plus or minus 0.5% of full scale deflection, plus or minus 2 counts
- Frequency lock: 45 to 65 Hz in 1 Hz steps, plus or minus 1 Hz
- Input impedance, voltage: 2 megohm, or 1 kilohm in LOW Z mode
- Input impedance, current: 94 kilohm
- Noise rejection: Better than 70 dB, greater than 3,000 to 1, at 50 Hz and 60 Hz
- GPS: ultra high sensitivity, minus 165 dBm
- Memory: internal storage for data logging
- Display: trans-reflective colour LCD
- Battery: two 3.7 V lithium ion NCR18650 cells, 8 to 16 hours
- Charging: 12 V DC, 2 A
- Operating temperature: 0 to 40 degrees Celsius
- Weight: 200 g
- Dimensions: 210 mm high x 100 mm wide x 32 mm deep
Common Applications
Used for earth grid performance assessment by off-frequency current injection, including fall of potential earth impedance measurement, step and touch voltage measurement, ground potential rise assessment, current split measurement and transferred potential investigation. Applied on transmission and distribution substations, power stations and industrial facilities where accurate earth grid voltage measurement is required in the presence of dominant power frequency noise.
Specifications
| Voltage input ranges | 0 to 6.0 V, 0 to 60 V and 0 to 300 V rms (resolution 100 µV, 1 mV, 10 mV) |
|---|---|
| Current input | 0 to 3.0 V rms (resolution 100 µV) |
| Accuracy | ±0.5% FSD |
| Tuning range | 45 Hz to 65 Hz in 1 Hz steps |
| Noise rejection | > 70 dB at 50 Hz and 60 Hz |
| Channels | 2, with phase angle between inputs |
| Data and GPS | Internal data logging, GPS |
| Battery | 3.7 V Li-ion, 8 to 16 h, charging 12 V DC 2 A |
| Weight and dimensions | 200 g, 210 x 100 x 30 mm |
Manufacturer's published specifications. Your quote confirms the configuration supplied.
What’s in the case
- TVM1100 tuned voltmeter
- Test leads and voltage probes
- 12 V DC charger
- Carry case
Why hire from Megavar?
Off-frequency injection testing is core work for Megavar, not an occasional job, and we run the TVM1100 and LCI2000C together on substation earthing assessments regularly.
Calibration
All Megavar test equipment is maintained under a documented calibration programme. Instruments are calibrated either by external calibration laboratories or in-house against reference standards that are themselves laboratory-calibrated, with measurement traceable to Australian national measurement standards held by the National Measurement Institute. A current calibration certificate is available on request. If your project requires a specific calibration interval, test standard, or documentation for a client submission, tell us at enquiry on 1300 730 499 and we will confirm what applies before you commit.
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Why hire from Megavar
A Tailored Hire Experience That Works for You
At Megavar, our dedicated test equipment hire division provides high-quality electrical testing instruments for both short and long-term use. Our team makes sure you receive the right tools, ready to go, every time. From fast dispatch to door-to-door freight, our hiring process is streamlined to get you up and running quickly and confidently.
- Rapid delivery and collectionDoor-to-door freight for minimal downtime
- Fast, simple bookingsPlace an order and we’ll handle the rest
- Fault supportIf a set plays up, call us and we will arrange a fix or a replacement.
Our 3-step easy process
Hiring Made Easy in 3 Simple Steps
Step 1: Request a Quote
Submit your rental request online, and our team will respond promptly with availability and pricing.
Step 2: Organise Your Rental
Once confirmed, we’ll quickly process your booking and dispatch the equipment. Delivery and collection can be arranged to suit your schedule.
Step 3: Use with Confidence
Supplied with the manufacturer’s manuals. If a set plays up, call us and we will arrange a fix or a replacement.
How the hire works
Hire terms in brief
After you enquire
We confirm availability, rates and freight in a written quote, valid for the period it states (usually 14 days). An enquiry or quote does not reserve equipment: the hire is booked when your purchase order, signed quote or email acceptance reaches us.
Hire period
Our carrier: up to 72 hours of transit each way is not charged as hire. Hire starts at delivery or 72 hours after dispatch, whichever is earlier, and ends at handover to our carrier or 72 hours before the equipment arrives back, whichever is later. Delay caused by us or our carrier is not charged. For example, dispatched Monday 10am and delivered Wednesday 2pm: hire starts Wednesday 2pm. Routes that normally take longer than 72 hours are marked on the quote. Your own freight: hire runs from handover to your carrier at our office until the equipment arrives back at our office. Collect in person: from collection to return.
Extensions and early return
Contact us before the return deadline to extend; your quoted rates stay fixed and extended hire is invoiced every 7 days. Return early and you pay only for the days used, at the rate band for the days actually hired.
Delivery and returns
Freight for each leg, the handling fee and any express dispatch are on the quote, before you accept. Returns go to the dispatching office named on the quote, by carrier or in person, never by post.
Counter times
Returned to our counter before 9am on a business day counts as the previous day. Collected after 4pm on a business day, hire starts the next day. Weekends and public holidays count as hire days.
Calibration and checks
Supplied in working order with listed accessories, leads and manuals. Each measuring instrument is calibrated, and its current NATA-traceable calibration certificate is available on request. If calibration falls due during your hire, we tell you before dispatch.
Cancelling or moving a booking
Cancel 5 or more business days before dispatch or collection and nothing is charged. With 2 to 4 business days’ notice, the charge is the greater of one day’s hire and 5% of the booked hire; with less notice, the greater of one day’s hire and 10%. You can ask once to move the start by up to 30 days, with at least 2 business days’ notice.
Loss, damage and insurance
The equipment is your responsibility, other than fair wear and tear, from the start of hire until it is back with us, including in transit, up to the replacement value cap shown on the quote for each item. No damage waiver is offered. We recommend you insure the equipment for its replacement value.
Payment and bond
Account customers pay each invoice within 14 days. Without a credit account, or paying by card, you pay the booked hire, freight, handling fee and any bond before dispatch. A bond applies only where the quote states one, and is refunded after return and inspection, less anything owed.
Summary of our Terms and Conditions: Test Equipment Hire. Full hire terms
Downloads
Enquire about Mitton Instruments TVM1100 Tuned Voltmeter for Hire Hire
When and where do you need it?
Send your hire dates and delivery location and we will confirm availability and lead time by the end of the next business day.
Or call us directly on 1300 730 499
Need help with your rental?
1300 730 499 We’re available Monday to Friday, 8:30 am to 5:00 pm. Urgent hire: call rather than send the form. rentals@megavar.com.auQuestions about this hire?
Call 1300 730 499 for availability, rates and booking. If a set plays up during the hire, call us and we will arrange a fix or a replacement. Counter collection and returns 8:30 am to 5:00 pm, Monday to Friday.
FAQ
Frequently Asked Questions
Mitton Instruments TVM1100 Tuned Voltmeter for Hire
What is the Mitton TVM1100 tuned voltmeter used for?
Measuring the small voltages produced during off-frequency current injection testing of earthing systems: fall of potential earth impedance, step and touch voltage, ground potential rise, current split and transferred potential. It is designed to accompany the Mitton LCI2000C injection unit but works with any off-frequency injection test.
Is the TVM1100 a digital or an analogue instrument?
Digital. It uses digital signal processing, locks to the injected test frequency anywhere from 45 Hz to 65 Hz in 1 Hz steps, and rejects power frequency noise at better than 70 dB, greater than 3,000 to 1, at 50 Hz and 60 Hz. It has a trans-reflective colour LCD, internal data logging and GPS.
What does the second channel do?
Channel 1 is a high input impedance voltage channel, auto-ranging across 0 to 6 V, 0 to 60 V and 0 to 300 V. Channel 2 accepts a flexible or clamp CT, so current and voltage are displayed together with the phase angle between them. That is what makes current split and grid impedance measurement possible with one instrument.
How accurate is the TVM1100?
Plus or minus 0.5 percent of full scale deflection, plus or minus 2 counts, per the manufacturer manual, Section 7.11. Filter accuracy depends on input conditions, and high noise levels may cause the instrument to select a higher range. Frequency lock is plus or minus 1 Hz.
How long does the battery last and how is it charged?
Two 3.7 V lithium ion NCR18650 cells give 8 to 16 hours of operation. A 12 V DC 2 A charger is supplied with the hire. Operating temperature is 0 to 40 degrees Celsius.
What is included with the Megavar hire?
The Mitton Instruments TVM1100 tuned voltmeter, test leads and voltage probes, the 12 V DC charger and a carry case.
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